6826620644 has 12 divisors (see below), whose sum is σ = 11966271744. Its totient is φ = 3407685864.

The previous prime is 6826620631. The next prime is 6826620649. The reversal of 6826620644 is 4460266286.

It is a junction number, because it is equal to n+sod(n) for n = 6826620595 and 6826620604.

It is not an unprimeable number, because it can be changed into a prime (6826620649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1403384 + ... + 1408239.

It is an arithmetic number, because the mean of its divisors is an integer number (997189312).

Almost surely, 2^6826620644 is an apocalyptic number.

It is an amenable number.

6826620644 is a deficient number, since it is larger than the sum of its proper divisors (5139651100).

6826620644 is a wasteful number, since it uses less digits than its factorization.

6826620644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812234 (or 2812232 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 44.

The square root of 6826620644 is about 82623.3662107760. The cubic root of 6826620644 is about 1897.0054994238.

The spelling of 6826620644 in words is "six billion, eight hundred twenty-six million, six hundred twenty thousand, six hundred forty-four".